The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 1990
Filed:
Oct. 14, 1987
Applicant:
Inventors:
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ; H04N / ;
U.S. Cl.
CPC ...
358 43 ; 358 41 ; 358 42 ; 358 44 ;
Abstract
A color imaging apparatus includes means for electronically non-linearly expanding or compressing the dynamic range of an image signal output therefrom. Separate output signals of respective brightness for different colors are logarithmically compressed, inverse-logarithmically converted, then linear-matrix-converted and multipled by a compression factor of brightness level for the respective color signals to produce a logarithmically compressed color signal without varying the tone.